Publications related to the GRACE Missions (no abstracts)

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Comparing Link Budget Requirements for Future Space-Based Interferometers

Sambridge, Callum Scott, Valliyakalayil, Jobin Thomas, and McKenzie, Kirk, 2024. Comparing Link Budget Requirements for Future Space-Based Interferometers. Remote Sensing, 16(19):3598, doi:10.3390/rs16193598.

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@ARTICLE{2024RemS...16.3598S,
       author = {{Sambridge}, Callum Scott and {Valliyakalayil}, Jobin Thomas and {McKenzie}, Kirk},
        title = "{Comparing Link Budget Requirements for Future Space-Based Interferometers}",
      journal = {Remote Sensing},
     keywords = {GRACE-FO, GRACE-C, NGGM, laser interferometery, phasemeter, femtowatt measurement, space-based interferometers},
         year = 2024,
        month = sep,
       volume = {16},
       number = {19},
          eid = {3598},
        pages = {3598},
     abstract = "{Inter-satellite interferometric missions are critical in the ongoing
        monitoring of climate change. Next-generation Earth geodesy
        missions are opportunities to improve on mission cost and
        measurement sensitivity through revised design. To be considered
        feasible, mission architectures must meet an optical power
        requirement that factors in both shot noise and laser frequency
        noise. Reference-transponder mission configurations, like the
        Gravity Recovery and Climate Experiment-Follow On (GRACE-FO)
        mission, are designed for measurement down to a received
        carrier-to-noise density ratio of 70 dB-Hz{\textemdash}1.9
        picowatts in shot-noise-limited detection. This work shows,
        through modeling and simulation, that the optical power level
        required to perform robust measurement varies significantly
        between mission configurations. Alternate configurations, such
        as retro-reflector-based schemes, can operate robustly down to
        much lower carrier-to-noise density ratios, with the example
        parameters considered here: down to 29 dB-Hz{\textemdash}150
        attowatts in shot-noise-limited detection. These results
        motivate exploration of alternate missions configurations with
        revised optical power requirements, increasing the feasibility
        of new designs.}",
          doi = {10.3390/rs16193598},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2024RemS...16.3598S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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